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Device for preventing false action of low-voltage apparatus implement device

A technology for low-voltage electrical appliances and malfunctions, which is applied to circuit devices, emergency protection circuit devices, parts of emergency protection devices, etc. Improve the anti-interference ability, the device is simple and practical

Active Publication Date: 2009-06-24
SEARI ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the monostable flip-flop has a certain settling time when it is powered on due to its working power supply and trigger signal.

Method used

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  • Device for preventing false action of low-voltage apparatus implement device
  • Device for preventing false action of low-voltage apparatus implement device
  • Device for preventing false action of low-voltage apparatus implement device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0028] In the first embodiment, the actuator is a flux converter.

[0029] figure 1 According to the first embodiment, the schematic circuit diagram of the device 100 for preventing the misoperation of low-voltage electrical appliances is disclosed. The device includes a logic delay circuit, and the logic delay circuit includes:

[0030] The power-on delay opening circuit 102 generates a delay signal;

[0031] The logic gate circuit 104 receives the delay signal generated by the power-on delay open circuit, and also receives the input signal from the input circuit 106, and outputs the input signal processed by the steady state to the drive circuit 108 through the logical combination of the delay signal and the input signal , and then drive the flux converter 110 .

[0032] refer to figure 2 , reveals the circuit diagram of the first embodiment.

[0033] The power-on delay opening circuit 102 is composed of a resistor R11 with a resistance value of 2K, a diode D11 and an e...

no. 2 example

[0035] In the second embodiment, the actuator is a release device.

[0036] image 3 According to the second embodiment, a schematic circuit diagram of a device 200 for preventing misoperation of low-voltage electrical appliances is disclosed. The device includes a filter circuit, and the filter circuit includes:

[0037] The transformer 202 collects current and generates an input signal;

[0038] A comparator 204, one input end is connected to the output of the transformer 202, and the other input end is connected to a predetermined threshold;

[0039] The first filter circuit 206 is connected to the output of the comparator 204, and filters the narrowband interference signal;

[0040] A monostable trigger 208, connected to the output of the first filter circuit 206, outputs a pulse signal;

[0041] The second filter circuit 210 is connected to the output of the monostable trigger 208. The second filter circuit 210 includes a delay capacitor. During the charging of the del...

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PUM

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Abstract

The invention discloses a device which can prevent malfunction of the executing device of the low-voltage electrical appliance and is connected between an input signal and a driving circuit; the driving circuit outputs a drive signal to drive the executing device to move, wherein, the device which can prevent malfunction of the executing device of the low-voltage electrical appliance comprises a logic delay circuit or a filter circuit; the logic delay circuit or the filter circuit receives the input signal and outputs the input signal after steady-state processing to the driving circuit; and the driving circuit generates a drive signal based on the input signal after steady-state processing. The device which can prevent malfunction of the executing device of the low-voltage electrical appliance is simple and practical and can effectively prevent malfunction of the executing device of the low-voltage electrical appliance and improve the anti-interference ability of the executing device of the low-voltage electrical appliance.

Description

technical field [0001] The invention relates to a technology for preventing misoperation of low-voltage electrical appliances, and more specifically relates to a device for preventing misoperation of low-voltage electrical appliances. Background technique [0002] In the field of low-voltage electrical appliances, such as frame circuit breakers, molded case circuit breakers, motor protectors, etc., when overcurrent, overvoltage, undervoltage and other faults occur in the circuit, it is necessary to use actuators, such as flux converters or trippers. The corresponding work plays a role in protecting the circuit. [0003] The release is often used to quickly break the main circuit to ensure the safety of the protected equipment. [0004] There are many kinds of drive circuits for trip units, including analog electronic trip circuits and digital electronic trip circuits. The analog trip circuit has the characteristics of fast and reliable, while the digital trip circuit has t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/00H02H1/00
Inventor 施惠冬邵福山朱文灏张聪谈永根胡景泰曾萍苏蓓璐
Owner SEARI ELECTRIC TECH